Improvement in pipe-tongs



S. LYNCH.

Pipe Tongs. No.102,690. I Patented May 3,1870.

N. PEYERS, Phelmulhognphsr. Washington. D. C,

STEPHEN LYNCH, OF NEW YORK, N Y.

Letters Patent No. 102,690, dated May 3, 1870.

IMPROVEMENT nv PIPE-TONGS.

The Schedulmrefened to in these Letters Patent and making part of the name To all whom it may concern Be it known that I, STEPHEN LYNCH, of the city,

county, and State of New York, have invented a new and useful Improvement in Pipe-Tongs; and I do hereby declare the following to be a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanying drawing forming part of tlns specification, in which drawing- Figure 1 represents a sectional side elevation of this invention. 1

Figure 2 is a transverse section of the same, the line a; x, fig. 1, indicating the plan of section.

Figure 3 is a. detached inside view of the box eon- I taining theslide-bit;

Similar letters indicate corresponding parts.

This invention relates to a pipe-wrench, the adjustable jaw of which is composed. of a. slide-bit fitted into a guide-box, and provided with a set-screw, which is connected to the slide-bit in such a manner that it imparts to the same a positive motion in either direction, the guide-box with its bit being" attached to one;

of the jaws of a pair of tongs, the other jaw of which is hook-shaped, like that of ordinary pipe-tongs, in su'clra manner that the bit of the tongs can be set to suit the difierent sizes of pipes; and, furthermore, if

the bit becomes broken or worn out, it can be readily taken out and repaired or replaced by another, and the efliciency of the pipe-tongs can be easily kept at its maximum pointwithout much trouble or expense.

In the drawing the letter A designates a hookshaped jaw, which is formed at the outer end of the handle B, and connected to the adjustable jaw, being secured to the outer end of the handle D.

Said-adjustable jaw consists of a bit, b, which is fitted into a box, c,'ancl subjected to the action of a screw, d, so that by turning said screw the bit is moved in and out. p

The screw is tapped into the bottom end of the box 0, and its tip is provided'with an annular groove to admit a toe, 0, formed at the inner end of the slide-bit, (see fig. 3,) so that byturning the screw a positive motion can be imparted to the slide-bit in either direct-ion, while said screw-retainsthe-bit firmly in any position into which it may be brought. Thebox c is attached to the outerend of the handle D by means of screws f g, so that it can be readily taken off, and that easy access can be had to the sliding-bit whenever it should be desirable to repair or to renew the same. It is obvious that the box a can be made of castiron, while the hit will by preference be made of steel,

and the other parts of the tongs either of steel or of wrought iron. 5 I

The bit ought to be tempered, so that its point will not be liable to wear 011 or become dull when brought in contact with the pipes.

By these means, a pair of pipe-tongsjis obtained which can be readily adjustcd for pipes of dilferent vsizes, and the bit of which can be readily kept in proper working order.

\Vhat I claim as new, and" desire to secure by Let-.

ters Patent, is-

The box 0, connected to the outer end of the handle D of a pair of pipe-tongs, and forming the guide for a slide-bit l), substantially as herein shown and described.-

STEPHEN LYN 0H.

Witnesses:

M. E. GoonHAn'r, WM. N. REED. 

